From 748e4f3d702def1a4bff191e0cf93b6a05340f01 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:41:34 +0000
Subject: [PATCH] add gpio led uart
---
kernel/fs/squashfs/xz_wrapper.c | 66 +++++++++++++++------------------
1 files changed, 30 insertions(+), 36 deletions(-)
diff --git a/kernel/fs/squashfs/xz_wrapper.c b/kernel/fs/squashfs/xz_wrapper.c
index 6bfaef7..e80419a 100644
--- a/kernel/fs/squashfs/xz_wrapper.c
+++ b/kernel/fs/squashfs/xz_wrapper.c
@@ -1,29 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Squashfs - a compressed read only filesystem for Linux
*
* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
* Phillip Lougher <phillip@squashfs.org.uk>
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
* xz_wrapper.c
*/
#include <linux/mutex.h>
-#include <linux/buffer_head.h>
+#include <linux/bio.h>
#include <linux/slab.h>
#include <linux/xz.h>
#include <linux/bitops.h>
@@ -130,11 +117,12 @@
static int squashfs_xz_uncompress(struct squashfs_sb_info *msblk, void *strm,
- struct buffer_head **bh, int b, int offset, int length,
+ struct bio *bio, int offset, int length,
struct squashfs_page_actor *output)
{
- enum xz_ret xz_err;
- int avail, total = 0, k = 0;
+ struct bvec_iter_all iter_all = {};
+ struct bio_vec *bvec = bvec_init_iter_all(&iter_all);
+ int total = 0, error = 0;
struct squashfs_xz *stream = strm;
xz_dec_reset(stream->state);
@@ -144,11 +132,23 @@
stream->buf.out_size = PAGE_SIZE;
stream->buf.out = squashfs_first_page(output);
- do {
- if (stream->buf.in_pos == stream->buf.in_size && k < b) {
- avail = min(length, msblk->devblksize - offset);
+ for (;;) {
+ enum xz_ret xz_err;
+
+ if (stream->buf.in_pos == stream->buf.in_size) {
+ const void *data;
+ int avail;
+
+ if (!bio_next_segment(bio, &iter_all)) {
+ /* XZ_STREAM_END must be reached. */
+ error = -EIO;
+ break;
+ }
+
+ avail = min(length, ((int)bvec->bv_len) - offset);
+ data = page_address(bvec->bv_page) + bvec->bv_offset;
length -= avail;
- stream->buf.in = bh[k]->b_data + offset;
+ stream->buf.in = data + offset;
stream->buf.in_size = avail;
stream->buf.in_pos = 0;
offset = 0;
@@ -163,23 +163,17 @@
}
xz_err = xz_dec_run(stream->state, &stream->buf);
-
- if (stream->buf.in_pos == stream->buf.in_size && k < b)
- put_bh(bh[k++]);
- } while (xz_err == XZ_OK);
+ if (xz_err == XZ_STREAM_END)
+ break;
+ if (xz_err != XZ_OK) {
+ error = -EIO;
+ break;
+ }
+ }
squashfs_finish_page(output);
- if (xz_err != XZ_STREAM_END || k < b)
- goto out;
-
- return total + stream->buf.out_pos;
-
-out:
- for (; k < b; k++)
- put_bh(bh[k]);
-
- return -EIO;
+ return error ? error : total + stream->buf.out_pos;
}
const struct squashfs_decompressor squashfs_xz_comp_ops = {
--
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